diff --git a/gdk/gdkframeclockidle.c b/gdk/gdkframeclockidle.c
index 8df1918a00..b3e07f86ab 100644
--- a/gdk/gdkframeclockidle.c
+++ b/gdk/gdkframeclockidle.c
@@ -622,7 +622,10 @@ gdk_frame_clock_paint_idle (void *data)
             }
 #ifdef G_ENABLE_DEBUG
             if (GDK_DEBUG_CHECK (FRAMES))
-              timings->frame_end_time = g_get_monotonic_time ();
+              {
+                if (timings)
+                  timings->frame_end_time = g_get_monotonic_time ();
+              }
 #endif /* G_ENABLE_DEBUG */
           G_GNUC_FALLTHROUGH;